Torus-shaped device for maintaining the air bags or water bags during the vulcanizing of pneumatic tires



Jan. 13, 1931. I E. GARABIOL. 1,788,428

TORUS SHAPED DEVICE FOR MAINTAINING THE AIR BAGS OR WATER BAGS DURING THE VULGANIZING OF PNEiJMAI'IC TIRES Filed Dec. 12, 1927 A T1 0 R rvEYs,

Patented Jan. 13, 1931 EMILE GARABIOL, OF LA. TRONCHE, NEAR.GRENOBLE, FRANCE,

IDES PROGEIDES l iTfl OF GRENO'BLE, FRANCE roIws-sHArEn DEVICE FOR MAINTAINING THE "Quarries 0R entree sures rarrnrrrie nssrenon 'ro SOCIETE WATER BAGS nunme THE vc' lcenrzrne or PNEUMATIC rr-ntns Application filed December 12, 1927, Serial No. 239,318, and in France Jun14=,'192'7.1

In the manufacture of pneumatic tires, and

in the retreading industry, in order to produce the internal pressure requlredgto vulcanize the tire casing in a mould, it is the customary practice to employ eitherair chambers or Water chambers.

Such chambers are designated pressures during the vulcanizing process.

However, a certam difficulty s met with when it is desired to place the sand air or Water chamber in the interior of the tire casingian'd'to hold it securely in position therein, when it is sub ecteol to the air or waprise pivotally mounted torus-shaped elements which consist of metal strips, of drawn steel pieces of the proper shape, or 03: cast metal, said elements bemg usually constructed so that they will have the exact diameter.

and internal shape of the air (or like) chamher which they support. It is an essential feature in the manufacture that" the said torus-shaped elements should be properly in sertechbut" this is difiicultto perform, and during the operation the air or water chamher is often pinched by the, device, or bulged pockets are formed, or the chambers will burst, or like accidents will take place. The

vulcanizing operation may also be attended with certain inconveniences.

The present invention has for its objects: 1..An improved torus-shaped element which securely holds the air or water ch amber during. the vulcanizing of the pneumatic tires, whereby all of the usual ldefectswill be obviated. The outer surface of the said torusshaped element has a- COIltlIlllOLlS concave shape corresponding to the'form of the air or water chamber; said elementessentially consists of a plurality of pieces fitting into each other and joined together by mere juxtaposition, and also of a wedge-shaped piece which completes the circular shapeof the torus and stifiens it, and of a doub1e-branched lever device which is pivotally mounted upon the pieces ofthe torus-shaped element adjacent as air-bags or Water-bags,1and they are SUlbJGClZGCi to high be inserted between the pieces-'2 and 3 the said. wedge-shaped member, and which serves by means of its two struts which are pivoted together in the space between'said branches, to place the wedge-shaped member;

inatic tires by means of a'irbags orwaterbags, which comprises-the placing and the us of the said torus for the maintenance of the said chamber in the tire casing during the op? eration.

The main features of my said invention will be specified in the following description with reference to" the appended drawings w rich are given byway example.

Fig. 1 is an elevational View, comprising a partial section, of the torus according to the invention, which is provided with a special key. i Fig.2 is'a section on the line 2+2 ofFig. Fig. 3 is a section on. the line 3 3 of Fig. Fig. 4 is a section 'on the line 4 i of Fig; 5 is a sectionon' the line 5-5 of Fig. Fig. '6 is a section on the line 66 of Fig. l. in the construction herein representedfthe torus-shaped member consists preferably of a r a-aw light cast 'metalsu'ch asjaluminium and is other attachingmeans. Their outer surface 1 5 has a semi-circular concave shaped action and is adapted'to hold to support the air chamber or the water'ch'alnber in a continuous and uniform manner upon its'whole length. Elie several pieces may be juxtaposed by means of accurate fiat end surfaces which exactly correspond in order'that thechamber will never be pinched these joints.

.The last piece 4 comprises inclined sides and thus-forms a wedge. On itsinternal face it comprises a. fiat part C by which it may and thus placed in position. Its outer facehas a concave shape like the other pieces and is placed in exact alignment therewith. "The said piece is preferably provided with side lugs engaging in the slots K formed in the forked. brackets D and? of the pieccs2 and 8; the said torus-shaped device is made rigid by pins or pegs inserted into holes in the said bracketsand intothe lugs provided on thesaid wedge-shaped piece.

The pieces 2 and 8 of the said torus are further provided with two other forked brackets A and B, or like elements, bywhich the said lever device serving for the insertion of the said wedge-shapedmember will be:

ber is put in place, and; herein, afterplacing the said chamber 11'1 p0S1t1OIl,I assemble the pieces l23 preferably at the lower part of the tire in such manner that they will be held together by their own weight. I then place the wedge-shaped piece 4 in position and drive it into place by handpress ure upon the branches M.N. By means 'of itsroller,

the joint C will drive in the piece 4: until its outer surface is inexact coincidence with the adyacent pieces. I tllBIlll'lSBlt at D and E suitable pins whereby the vpiece 4 is secured and the whole torus-shaped device is consolidated in a rigid and reliable manner. The apparatus will thus have the exact circular form, and will act atall points against the extension and deformation of the air bag or the water ba V y j Y Obviously, my said invention is not limited to the details of construction herein specified, these being given solely by way of ex- Havingnowtrolling thewedge maybe varied as particular, the lever device condesired in shape and disposition; other fastening nieansmay be'empl'oyed; any suitable number of pieces may be assembled, and like disample. In

positions may be employed,without depart-V in o from the spirit of the invention.

described my invention what desire to secure by Let- I claim as new and ters Patent is: V

- 1. A torus-shaped device for maintaining the air-bags or water-bags during: the vulcanizing of pneumatic tires comprisinga number of arcuated elements having a groove on their externalface and fitting into each other by mere yuxtaposition endto end, so

as to forin a nearly complete ring leaving between its ends a free space limited by inversely inclined faces, a wedge-shaped piece also provided with an external groove adapted to fill said free space so as to complete the ring and to assure its rigidity, and means adapted to hold said wedge-shaped piece in saidtree Space 2. A torus-shaped device for maintaining the air-bags or water-bags during the "vu l can-izing of pneumatic tires comprising a number of arcuated elements having 'a groove- 'on their external face and'fitting into each other mere juxtaposition end to end, so as to form a nearly complete ring leaving between its ends a free space limited by inversely. inclined faces, a wedge-shaped piece also provided with an external grooveadaptr ed to fill sa d freev space andto fit into said ends of said ringand pins extending through saidwedge-piece and through said ends of said ring in order to secure said wedge-piece in said free space. I I I A torus-shaped device for maintaining the-air-bags or water-bags during the vul 'canizing, of pneumatic tires comprising-a number of arcuatedelements having a groove 'on their external face'and fitting into each other by mere juxtaposition so as'to form a nearly complete ring leaving between its ends a free space limited by inversely inclined faces, a wedgeeshaped piece also provided with anexternal groove adapted to fill said free space; so as to complete the ring and to assure its rigidity, and. means adapted to urge said wedge-shaped piece intosaid free space. v v

4. A torus-shaped device for mamtaining theair-bags or water-bags during the vul canizmg of pneumatic t1res compr sing a number of arcuated elements having a groove on their-external face and fitting into each other mere juxtaposition so as to form anearly complete ring leaving between its ends a free space limited by inversely inclined faces, a'wedge-shaped piece also provided with an external groove adaptedto fill'said free space so as to. complete the ring an'd'to assure'its rigidity, two levers pivoted on said ring'on opposite sides ofthe free space and two arms pivoted on said levers andhaving their ends hinged together and adapted to bear onthe inner face of said wedge-shaped piece. 7 "f 7 u v r 7 5; A torus shapeddevicefor maintaining the air-bags, orflwater-ba'gsiduring the vulcanizingfof'fpneumatic'tires comprising a' number of arcuated elements having a groove on their external face and provided at their ends with corresponding projections and recesses, whereby'they are adapted to'be assembled end to end and to fit into each other so as to be prevented from sliding transversely and to fjormfanearlyj'complete rin Y leaving between its ends faffreespace' limite by inversely inclinedfac es, a wedge sh aped piece also provided with an external groove adapted to fill said free space so as to complete the ring and to assure its rigidity, and

means adapted to hold said wedge-shaped 5 piece in saidfree space.

6. A torus-shaped device for maintaining the air-bags or water-bags during the V111- canizing of pneumatic tires comprising a number of arcuated elements having a groove on their external face and jointed together end to end by means of a tongue and mortise joint so as to be revented from sliding transversely and to ihrm a nearly complete ring leaving between its ends a free space limited by inverselyinclined faces, a wedge-shaped piece also provided with an external groove adapted to fill said free space so as to'complete the ring and to assure its rigidity, means adapted to hold said Wedge-shaped piece in said free space, means for urging said wedgeshaped piece into said free space and means for securing in place said Wedge-shaped piece.

In testimony whereof I have signed my 1 name to this, specification. i

V EMILE GARABIOL. 

